1149 results about "Rotary valve" patented technology

The utility model provides a quick-connection ball valve which comprises two ball valves, the two ball valves are in linear clamping connection, each ball valve is provided with a through hole for fluid to pass through, each ball valve comprises a valve body, a valve element is arranged in each valve body, each valve element is connected with a valve rod, the end, away from the corresponding valve element, of each valve rod extends out of the corresponding valve body, and the end, extending out of the corresponding valve body, of each valve rod is connected with a handle. The handle drives the valve element to rotate through the valve rod. And the valve body is provided with a locking device. The locking device comprises a locking groove and a locking column; the handle is in driving connection with the locking column. When the handle is closed, the locking column is arranged in the valve body; when the two ball valves are in butt joint and the handle is opened, the handle drives the locking column to stretch into the locking groove of the other ball valve, the locking device locks the two ball valves, the two ball valves are prevented from rotating and disengaging, fluid leakage caused by looseness is avoided, and the safety of valve body connection is improved.

The invention relates to the technical field of glaze pretreatment in the field of glass processing, and discloses a multifunctional glass glaze filtering and stirring machine. Comprising a filtering stirrer control screen, a lifting frequency control spring, a rotary valve, a glass glaze adding funnel, a switch valve, a stirring head, a gauze replacing valve, a glass glaze barrel, a filtering stirrer bracket and a filtering stirrer fixing balance rod, a glass glaze barrel is arranged on the filtering and stirring machine support and is connected with a barrel cover through threads, a glass glaze adding funnel is arranged on the barrel cover, and a switch valve is arranged on a channel of the glass glaze adding funnel; the filtering stirrer control screen is arranged on the filtering stirrer bracket and is at least provided with an ascending button, a descending button and a rotating button; and the lifting frequency control spring is arranged above the barrel cover. The invention provides integrated and automatic multifunctional equipment, efficient filtering is achieved in the stirring process, and meanwhile the problems of blockage, pollution and parameter adjustment are solved.

The present invention discloses a dynamic composite distortion simulator and a working method thereof in the technical field of aero-engine air inlet and engine matching. The simulator comprises a process air inlet, a spoiler column, a rotary valve and a high-speed motor. The spoiler column is installed inside the process air inlet, and the rotary valve is installed in the cavity of the spoiler column. One end of the rotary valve extending out of the spoiler column is connected to the high-speed motor. Dynamic distortion vortices are formed by utilizing the flow around the column and the rotary valve, and parameters such as the intensity and scale frequency of the vortex change with changes in the motor speed and the angle of attack and height of the spoiler column. This can effectively simulate the dynamic distortion flow field structure generated in the air inlet due to various reasons, overcome the shortcomings of existing simulators in simulating dynamic distortion, form a flow structure similar to the distortion flow field at the outlet of the real air inlet, so as to more realistically simulate the air inlet matching process, significantly improve the experimental efficiency and accuracy, and do not require an external air source.

According to the nucleic acid extraction and detection device and the use method, by forming a plurality of communicating holes and taking a rotary valve as a communicating medium, communication among functional chambers is achieved, then sample transfer is achieved, the whole transfer process is completed in an internally-closed environment, sample pollution is not caused, and the detection efficiency is improved. The rotating cover and the rotating valve rotate synchronously, and the rotating cover is also closed when the rotating valve is closed, so that the sealing performance of the cavity in the uniform mixing and reaction process is ensured, and the stability of a pre-stored reagent and the safety of the reaction process are ensured; the sample transfer step is reduced, the pollution risk is reduced, the whole process is completed only through manual operation without a power supply or other equipment, and the method can be used for household self-inspection or in areas with limited resources or even in extreme environments without power supply.

The cooling module includes: a manifold being made of resin and including a plurality of housings joined to one another; and a rotary valve formed by arranging a valve body rotating about a rotation axis in a cylindrical valve chamber formed in the manifold. The manifold includes a plurality of internal flow paths through which fluid flows and a plurality of ports that are connected to a plurality of the internal flow paths and through which the fluid flows in or flows out. The rotary valve has a full communication mode in which, when the fluid is flowed in from one port of a plurality of the ports, the fluid can be flowed out from all the other ports.

The invention relates to an efficient and energy-saving system for continuously removing VOC (Volatile Organic Compounds) from a polypropylene material. The system comprises a, a feeding device; the ridge tower sequentially comprises a preheating section, a devolatilization section, a pre-cooling section and a cooling section from top to bottom, a middle rotary valve is arranged between the pre-cooling section and the cooling section, and the preheating section, the devolatilization section and the pre-cooling section are used for conducting preheating, devolatilization and pre-cooling treatment on the PP particles under the action of heated nitrogen; a feeding rotary valve is arranged at the top of the ridge tower, and a discharging rotary valve is arranged at the bottom of the ridge tower; the nitrogen generating device and the heater are respectively used for generating and heating nitrogen so as to provide hot nitrogen required by devolatilization treatment; a heating section fan is arranged between the nitrogen generating device and the heater; d, a cooling section fan is used for further cooling the pre-cooled PP particles; and e, a middle rotary valve and a discharging rotary valve. The VOC in the polypropylene granules is reduced to be less than 50ppm through nitrogen operation, and the odor grade is less than 4.0. Finally, the VOC content in the polypropylene is reduced, meanwhile, the odor grade is reduced, and the quality of the polypropylene resin is improved.

The present disclosure provides a double-tank oral irrigator. The double-tank oral irrigator includes a rotary valve, a first tank, a second tank, a water guide pipe, and a pump assembly. The rotary valve includes an outlet part, a first inlet part, a second inlet part, and a valve core. The rotation of the valve core enables adjustment of the sealing degree of the valve core to the first inlet part and the second inlet part. The first inlet part is connected to the first tank, the second inlet part is connected to the second tank, and one end of the water guide pipe is connected to the outlet part. The pump assembly is connected to the other end of the water guide pipe and a spray outlet of the oral irrigator.

The present invention discloses a rotary valve, which includes: a valve body, which is a cylindrical structure, and is provided with three flow channel groups; and a valve sleeve, whose coaxial sealing sleeve is provided on the valve body, and the valve sleeve is evenly provided with multiple through holes, the inner end of each through hole extends to form a vertical groove, and the vertical groove is divided into three sections along the vertical direction, corresponding to the ports of different flow channel groups respectively. A switching valve is provided at the through hole, and the switching valve connects the through hole to the two sections of the vertical groove, thereby switching the corresponding two flow channel groups to a working state. The valve body rotates around the axis relative to the valve sleeve so that the multiple through holes are combined and connected with the ports of the two flow channel groups in the working state, thereby changing the process operation mode. Each through hole is connected to at most one port of the valve body. The present invention also discloses a pressure swing adsorption device. The rotary valve of the present invention can switch the working state of the flow channel group, realize online switching of the timing process, meet the demand for improvement of process conditions due to fluctuations in on-site raw materials, and enhance production flexibility.

Disclosed is a flow path switching device including: a case including a first nozzle into which fluid is introduced, a second nozzle through which fluid is discharged, a plurality of inner outflow pipes through which fluid supplied from the first nozzle flows, a plurality of inner inflow pipes through which the fluid supplied to the second nozzle flows, and a flow path connection portion in which a space is formed to communicate the plurality of inner outflow pipes with the first nozzle or to communicate the plurality of inner inflow pipes with the second nozzle; a valve rotatably disposed in the space of the flow path connection portion, and having a first chamber connecting one of the plurality of inner inflow pipes and the first nozzle according to placement, and a second chamber connecting one of the plurality of inner outflow pipes and the second nozzle; and a motor disposed in one side of the valve and rotating the valve. Each of the first nozzle, the inner outflow pipe, and the flow path connection portion forms a flow path perpendicular to each other inside. A first chamber hole connecting the first chamber and a nozzle flow path formed inside the first nozzle is formed in the valve. A cross-sectional area of the nozzle flow path is reduced to a size corresponding to the first chamber hole from an inlet portion of the first nozzle towards the flow connection portion.

The invention relates to the field of pressure valves, in particular to a proportional pressure valve with a self-adaptive non-return function. Comprising a valve body and a valve element, a first outlet and a second outlet which penetrate through the interior of the valve body are formed in the peripheral side of the valve body, a flow channel is formed in the valve element, annular valve cavities communicated with the two outlets are formed between the valve body and the valve element respectively, and a non-return structure is arranged in each annular valve cavity and comprises a fixed valve sleeve and a rotary valve sleeve. An inner hole is formed in the fixed valve sleeve, an outer hole is correspondingly formed in the rotary valve sleeve, a torsional spring is fixedly connected between the rotary valve sleeve and the fixed valve sleeve, and a pressed part is arranged on the outer side of the rotary valve sleeve. Through cooperative action of the rotary valve sleeve and the fixed valve sleeve, the pressed part triggers rotation under countercurrent high pressure to achieve staggered closing between the inner hole and the outer hole, meanwhile, the pressure relief channel is synchronously opened for rapid pressure relief and first-stage non-return, the inner hole and a flow channel are cut off in combination with the pressing ring, and second-stage non-return is conducted; and the stability and the safety of the proportional pressure valve under complex working conditions are improved.

The invention discloses a peritoneal drainage flushing device based on multi-dimensional parameter monitoring and a negative pressure regulation and control system, and belongs to the technical field of peritoneal drainage. The peritoneal drainage flushing device and negative pressure regulation and control system based on multi-dimensional parameter monitoring comprises a device support, a multi-channel rotary valve and two negative pressure pumps, a flow guide pipe and a backflow pipe are arranged between the two negative pressure pumps and the multi-channel rotary valve, and pipeline detection modules are installed on the flow guide pipe and the backflow pipe. The peritoneal drainage device solves the problems that an existing peritoneal drainage device is not ideal in treatment effect and affects the treatment effect when a drainage tube is blocked, early intervention is carried out by adjusting a negative pressure pump, a multi-channel rotary valve and a three-way electromagnetic valve, targeted treatment is automatically triggered at the early stage of complications through continuous and multi-dimensional monitoring, and the treatment effect is effectively improved. The tube blocking rate, the abdominal infection rate and the abdominal hypertension syndrome occurrence rate are remarkably reduced, the pain of a patient is relieved, the recovery time is shortened, and personalized and self-adaptive adjustment is carried out according to the physical state of the patient.

A kind of reciprocating compressor full-range control type rotary cup exhaust valve, including valve seat, valve core, valve rod and the like components, valve core and valve seat all adopt V cup type structure, valve core and valve rod adopt integrated structure, are controlled by rotary motion driving device full range, set the motion law of valve core, valve rod, execute acceleration, deceleration, waiting and brake and the like motion instruction, realize rotary valve opening and closing, rotary friction is small, sealing performance is good, long-term use wear can be automatically compensated, flow coefficient is big, resistance coefficient is small, the effective flow area of valve core and valve seat is more than 2 times of conventional plane-shaped meshed intake valve;The present application also has the characteristics of no impact, long stay time when fully open, overcome the essential defects of the prior art meshed exhaust valve, such as large resistance loss, valve piece impact is serious;The present application can be used for the modification of existing meshed exhaust valve, and can also be used as a complete set of exhaust valve for new reciprocating compressor.

A POCT cartridge, a POCT device, and a POCT method. The POCT cartridge comprises a cartridge body (100) and a rotary valve (200). The cartridge body (100) is provided with a sample loading cavity (101), a sample treatment cavity (102), a lysis liquid cavity (103), a magnetic bead liquid cavity (104), a cleaning liquid cavity (156), an eluent cavity (107), a rich solution cavity (108), a waste liquid cavity (109), a transfer cavity (110), a PCR cavity (1234), a power source cavity (115), and a ventilation cavity (116); a back surface of the cartridge body is further provided with a plurality of flow channels, and the power source cavity (115) is in communication with the transfer cavity (110). The rotary valve (200) is rotatably mounted on a front surface of the cartridge body (100), and the rotary valve (200) is provided with a valve liquid path (211), an exhaust gas path (221), and an exhaust structure (212). By rotating the rotary valve (200), the valve liquid path can be selectively brought into communication with the plurality of flow channels; in addition, under the action of a power source, various steps of sample addition, lysis, magnetic bead binding, cleaning, elution, mixing of a nucleic acid with a rich solution, and a PCR reaction can be completed.

A control valve and a thermal management assembly including the control valve are provided. The control valve includes a valve body component and a valve core; the valve body component is provided with interface channels, the valve core is provided with flow guiding channels, there are N flow guiding channels, and there are 2N interface channels, wherein N≥3 and N is an integer; by rotating the valve core, the 2N interface channels can implement communication between each two interface channels in different forms by the N flow guiding channels; in this way, when the control valve is applied to the thermal management assembly, the control valve can control multiple flow paths in the thermal management assembly by rotating the valve core.

The invention relates to a rotary valve electric heating device and a control method. The control method of the rotary valve electric heating device comprises the steps that a first temperature signal of an electric heating plate and a second temperature signal of a rotary valve are obtained; filtering the first temperature signal and the second temperature signal to obtain a first filtering temperature and a second filtering temperature, and calculating a corresponding temperature difference value according to the first filtering temperature and the second filtering temperature; judging that the second filtering temperature is lower than a lower limit threshold of a preset target temperature interval, and judging that the second filtering temperature is higher than an upper limit threshold of the preset target temperature interval; judging whether the temperature difference value exceeds a temperature difference threshold, and judging whether the first filtering temperature exceeds a safety upper limit temperature; and switching on the power supply of the electric heating plate and switching off the power supply of the electric heating plate. The precision of temperature regulation and control is guaranteed, the temperature of the rotary valve shell is close to the process requirement range, and the stability and safety of the operation process are improved.

A friction reduction tool configured for selective activation downhole in response to a variation in a media flow's operating condition. A valve assembly and an activation assembly are both positioned downstream of a power assembly, which is configured to rotate a rotating valve segment of the valve assembly with media flow through the tool. The activation assembly is configured to transition from a first position to a second position with the media flow operating condition variation. In the first position, the activation assembly provides a bypass flow path around the valve assembly for at least a portion of the media flow, thereby preventing the valve assembly from generating any significant pressure pulse with rotation of the rotating valve segment. In the second position, the bypass flow path is closed such that all or a majority of the media flows through the valve assembly, thereby generating a significant pressure pulse.

The present technology relates to an automatically locking, releasable, safety knob assembly for a stove. The assembly includes a base with a locking notch. An adapter mates with the stove's valve stem and has a head, a tubular middle section, and an adapter base with a central aperture for receiving the valve stem. The knob includes a housing with a housing disk covering the base, an arm movement channel aligned with the locking notch in the locked configuration, and a central aperture for receiving the adapter head. The assembly further includes a sub-assembly with a slidable button allowing free rotation of the knob in the unlocked configuration, an automatic locking arm biased with the slidable button, and engagement with the button causing the arm to disengage from the locking notch and move in the arm movement channel, enabling the knob to freely rotate and rotate the valve stem.

A distribution valve includes a cylindrical valve body rotatably fitted into a valve main body having a first outlet, a second outlet, and an inlet, and a driver for rotating the valve body, and the distribution valve distributes fluid flowing from the inlet into the valve body to the first and second outlets. The valve body has a peripheral wall portion and a bottom surface portion that function as seal surface portions to close the first and second outlets and the inlet. The peripheral wall portion is formed with first and second opening portions configured to continuously change opening areas of the first and second outlets. The bottom surface portion is formed with a third opening portion configured to change an opening area of the inlet within a predetermined range. A valve seat member is arranged in the inlet, causing a seal portion to adhere to the bottom surface portion.

The invention discloses a double-support rotary full-bore throttle valve and a station switching method. Through the core assembly composed of the actuator, the valve rod, the rotary valve element, the double-end bearing supports and the like, a stress model is optimized into a stable simply supported beam structure from a traditional cantilever beam structure, vibration caused by fluid impact is remarkably restrained, and the operation stability of the whole machine is enhanced. The rotary valve core is integrated with a variable-cross-section throttling molded surface, a large-diameter full-bore flow channel and a cut-off molded surface, so that the equipment not only can realize continuous adjustment of flow and pressure, but also can perform on-line blockage removal and pollution discharge by rotating and switching to a full-bore state under the condition of not closing an upstream valve and a downstream valve, and the maintenance process is greatly simplified. In addition, according to the design, the axial telescopic space is omitted through the rotary motion principle, a valve element sleeve protection structure is omitted through high stability, the equipment size and material consumption are effectively reduced, and the beneficial effects of being high in function integration degree, high in erosion resistance, long in service life and the like are achieved.

The rotary four-way arbitrary intercommunication valve comprises a valve body and a valve element, and the valve element extends into the valve body and is in running fit with the valve body. And the valve core is used for switching the communication between any adjacent ports and the communication between the opposite ports every time the valve core rotates by 45 degrees in the valve body through the layered flow channel structure between 0 degree and 180 degrees. The four-way valve is composed of the valve body and the valve element, switching of any two-to-two communication among the four ports is flexibly controlled by rotating the angle of the valve element, mutual communication of the ports with specific flow direction combinations is supported, the function of dynamic random communication of the four ports is achieved, the sealing performance between the valve body and the valve element is improved, and the sealing performance of the valve body and the valve element is improved. The overall structural design is compact and simple, the characteristics of layered flow channels and high sealing performance are achieved, and the leakage rate is greatly reduced. The invention further discloses a rotating method for rotating the four-way arbitrary intercommunication valve.

The invention relates to the technical field of valves, in particular to an eccentric rotary valve which comprises a valve body, an upper valve rod, a lower valve rod rotationally arranged in the valve body and a valve element located in the valve body, the valve element is fixedly provided with an upper shaft diameter coaxially fixed to the upper valve rod and a lower shaft diameter coaxially fixed to the lower valve rod, and a valve seat and a limiting piece are arranged in the valve body; an upper stuffing box is arranged on the inner wall of the valve body, sealing stuffing is arranged on the inner wall of the valve body, an upper sliding bearing is jointly arranged on the peripheries, close to each other, of the upper shaft diameter of the upper valve rod and the upper shaft diameter of the valve element in a sleeving mode, and a stuffing pressing sleeve used for blocking a gap is fixedly arranged on the inner wall of an opening, facing the outside, of the upper stuffing box; the possibility that medium thrust borne by the valve element is conducted to the upper valve rod and the lower valve rod is effectively reduced, valve element position change caused by medium impact is greatly reduced, and the situation that the valve element deviates, and the valve rod additionally bears the medium thrust is avoided.

The invention discloses a machining device and technology for a valve element of an eccentric rotary valve, and relates to the field of valve element machining, the machining device comprises a machine body, two bearing plates and a drill rod, the two bearing plates synchronously slide on the machine body, and profiling grooves matched with the valve element in shape are formed in the bearing plates; the drilling rod is rotationally arranged on the machine body and used for machining a valve element through hole, a clamping assembly for clamping and fixing a valve element is arranged on the bearing plate, an avoiding groove is formed in the position, located on the bottom wall of the profiling groove, of the bearing plate, the avoiding groove corresponds to the through hole in position, and a plurality of scrap hooking blocks are distributed on the position, located on the inner wall of the avoiding groove, of the bearing plate. A receding part is formed on the upper side of the scrap hooking block, and a hooking part is formed at the end of the scrap hooking block. The valve element machining device is beneficial to improving the batch machining efficiency of the valve elements.

The invention relates to the technical field of scaffolds, in particular to a hydraulic jacking scaffold moving device which comprises a scaffold body and symmetrically-arranged supporting moving devices, and each supporting moving device comprises a fixing sleeve, an inclined rod, a hydraulic cylinder, a supporting cushion table, a manual valve, a pedal, auxiliary wheels, an oil tank and other components. The oil tank is connected with the hydraulic cylinder through a main oil pipe, the main oil pipe is connected with a manual valve in series, a rotary valve seat of the manual valve is fixedly connected with a pedal and a supporting rod which are perpendicular to each other, and an auxiliary wheel is arranged at the tail end of the supporting rod; an electromagnetic valve is arranged at the front end of the branch oil pipe on the main oil pipe, and an energy storage piston rod is connected with a pedal through a pull rope. During operation, the pedal is treaded to control opening and closing of the manual valve, auxiliary wheel supporting and action of the energy storage oil cylinder in a linkage mode, efficient switching between stable supporting and flexible moving of the scaffold is achieved, external power is not needed, and the scaffold is suitable for multiple construction scenes.

The invention discloses a vibration reduction assembly and an extremely-low vibration reduction system for an extremely-low-temperature refrigeration platform. The vibration reduction assembly comprises a main frame. The active suppression platform is arranged above the main frame, reads a signal in real time through a sensor in the active suppression platform and feeds back the signal to an internal control unit, and the control unit sends an instruction to reversely adjust the compression amount of an internal spring so as to realize active vibration reduction; the rotary valve vibration reduction mounting seat is used for respectively fixing the rotary valve motor and the phase modulation air reservoir through a supporting plate and a fixed clamping block and realizing vibration reduction through a vibration reduction element arranged in the rotary valve vibration reduction mounting seat; a second vibration reduction body is arranged in the corrugated pipe assembly so as to reduce vibration in the vertical direction and the radial direction. According to the invention, the active suppression platform is arranged to actively eliminate vibration so as to reduce vibration or vibration transmission. The corrugated pipe is arranged above the active restraining platform, vertical vibration of the cold head of the refrigerating machine can be reduced, a plurality of second vibration reduction bodies are arranged on the periphery of the corrugated pipe body, and radial vibration of the cold head of the refrigerating machine can be reduced through the second vibration reduction bodies.

A hygienic rotary valve is designed to meet the hygiene application requirements of handling powdered and granular materials in the food industry. The hygienic rotary valve is a material conveying device installed beneath a powdered and granular material silo, and enhances operational capabilities of the rotary valve by improving the flow rate of powdered and granular materials; providing viewing windows to view the internal state; simplifying the disassembly and assembly procedures (Easy Access) to reduce cleaning process time; implementing Clean-In-Place (CIP) and Steam-In-Place (SIP) processes. The hygienic rotary valve includes a valve body, guide rails, a gear motor, a side cover, a transmission shaft, an end cover, a rotor, a front door, and a device for blowing off adhered powdered and granular materials. In a dust-filled working environment, air purge protection is provided to prevent powdered and granular materials from invading the power transmission area.

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and a first air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are all communicated with the valve element cavity are formed in the outer wall of the valve body, and the first through hole is connected with the piston cylinder. The rotary valve element is in a cone shape or a circular truncated cone shape and is rotatably installed in the valve element cavity, and the rotary valve element rotates in the valve element cavity so that the first through hole can be communicated with the second through hole or the third through hole. The first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that part of the rotary valve element can be separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated.

The invention is a universal blower attachment that will fit any standard handheld leaf blower or standard backpack blower and a system for atomizing and dispensing insecticides and other liquids, with an adjustable turn valve to adjust liquid pressure, allowing a pressurized tank to continually force liquid through one or more adjustable nozzles for continuous atomization and spraying into the exhaust stream of the leaf blower.

A centrifugal separator system separates particulate matter from an air stream produced by an industrial shredding machine. The system includes a housing having a cylindrical conical shape defining an interior chamber. An inlet positioned tangentially near the top of the housing introduces an air and particle mixture to create a vortex flow that centrifugally displaces heavier particles where they slide downward to discharge aperture. Clean air reverses direction and exits upward through a central top outlet connected to a HEPA filter for removing residual dust. A first silo directs is used to decelerate separated particles which are directed through a rotary valve providing an airlock to maintain pressures for optimizing centrifugal separation of particles. A second silo receives a bag holder for ease of securing a collection bag. The system provides efficient separation of particles with minimal maintenance and allows continuous operation.

A rotary valve for bulk material comprises a housing (3) having an interior space (4) with an inlet opening (35) and an outlet opening (36), side covers (21, 22) which delimit the interior space (4) at the front, a rotary wheel (7) which is arranged in the interior space (4) so as to be drivable for rotation about a longitudinal axis (8) and which is held on the side covers (21, 22), and a stopping unit (16) for deliberately stopping a rotational movement of the rotary wheel (7), the stopping unit (16) interacting with the rotary wheel (7).

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and an air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are communicated with the valve element cavity are formed in the outer wall of the valve body, the first through hole is connected with the piston cylinder, the second through hole is connected with an external material cylinder, and the third through hole is connected with an external outlet; the rotary valve element is rotatably mounted in the valve element cavity, and the first through hole is communicated with the second through hole or the third through hole through rotation; the first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that the rotary valve element can be partially separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated. The lifting device is in sliding connection with the piston.